<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片式图 -->
    <el-card>
      <el-row>
        <el-col>
          <el-button type='primary'>添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 用户列表区 -->
      <el-table :data="rolesList" border stripe>
        <el-table-column type='expand'>
          <template slot-scope="scope">
            <el-row :class="['bdbottom','vcenter',i1 === 0 ? 'bdtop' : '']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
              <!-- 一级权限 -->
              <el-col :span='5'>
                <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 二级权限 -->
              <el-col :span='19'>
                <el-row :class="['vcenter',i2 !== 0 ? 'bdtop' : '']" v-for="(item2,i2) in  item1.children" :key="item2.id">
                  <el-col :span='6'>
                    <el-tag type='success' closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span='18'>
                    <el-tag v-for="(item3) in item2.children" :key="item3.id" type="warning" closable @close="removeRightById(scope.row,item3.id)">{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <el-table-column type='index'></el-table-column>
        <el-table-column label='角色名称' prop="roleName"></el-table-column>
        <el-table-column label='角色描述' prop="roleDesc"></el-table-column>
        <el-table-column label='操作' width='300'>
          <template slot-scope="scope">
            <el-button size='mini' type="primary" icon="el-icon-edit">编辑</el-button>
            <el-button size='mini' type="danger" icon="el-icon-delete">删除</el-button>
            <el-button size='mini' type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 分配用户权限的对话框 -->
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
      <el-tree :data="rightsList" show-checkbox node-key="id" :props='treeProps'
      default-expand-all :default-checked-keys="defkeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data () {
    return {
      rolesList: [],
      setRightDialogVisible: false,
      rightsList: [],
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      defkeys: [],
      roleId: ''
    }
  },
  created () {
    this.getrolesList()
  },
  methods: {
    async getrolesList () {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败')
      }
      this.rolesList = res.data
    },
    async removeRightById (role, rightId) {
      const confirmResult = await this.$confirm('确认删除该权限?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除失败')
      }
      this.$message.success('删除成功')
      role.children = res.data
    },
    // 展示权限对话框
    async showSetRightDialog (role) {
      this.roleId = role.id
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限列表失败')
      }
      this.rightsList = res.data
      this.getLeafkeys(role, this.defkeys)
      this.setRightDialogVisible = true
    },
    getLeafkeys (node, arr) {
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => {
        this.getLeafkeys(item, arr)
      })
    },
    setRightDialogClosed () {
      this.defkeys = []
    },
    // 点击为角色分配权限
    async allotRights () {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idStr = keys.join(',')
      const { data: res } = await
      this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败')
      }
      this.$message.success('分配角色权限成功')
      this.getrolesList()
      this.setRightDialogVisible = false
    }
  }
}
</script>

<style lang='less' scoped>
.el-tag{
  margin: 10px;
}
.bdtop{
  border-top: 1px solid #eee;
}
.bdbottom{
  border-bottom: 1px solid #eee;
}
.vcenter{
  display: flex;
  align-items: center;
}
</style>
